JPS6163770A - Polyester multifilament yarn for sizeless weaving of water jet loom - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

Detailed Description of the Invention (Field of Industrial Application) Mizumoto FJJ4 relates to a water jet loom (WJL) non-sizing polyester multifilament yarn that does not require warp sizing.

(Prior art) In recent years, in order to speed up weaving and simplify the weaving process, the development of glueless fHI weaving technology for polyester multifilament yarn using a water jet loom has become active.
In the spinning process, a special cohesion-improving oil or an oil that improves both cohesiveness and abrasion resistance is applied, and in addition to these oil treatments, a fluid injection process is used to intertwine the single yarns that make up the multifilament yarn. Proposals have been made to apply so-called interlace processing to
3240, JP 54-2439, JP 50-101694, JP 52-103545
(see publication).

These conventional methods are sufficiently practical when the weaving speed of the water jet loom is relatively low at around 450 rpm;
If the rpm is exceeded, the number of weavable repeats rapidly decreases due to reed abrasion, which has the disadvantage that continuous weaving for a long time becomes impossible.

(Problems to be Solved by the Invention) The present invention solves the above-mentioned conventional drawbacks, and eliminates the occurrence of reed wear in glueless high-speed weaving of polyester multifilament yarn using a water jet loom (especially high-speed weaving of 500 rpm or more). The object of the present invention is to provide a polyester multifilament yarn for water jet loom glueless weaving, which can greatly increase the number of weaving turns.

(Means for Solving the Problems) The technical means for solving the above problems, that is, the configuration of the present invention is as follows.

A polyester multifilament yarn for water jet loom glueless weaving, which is surface-treated with an aqueous emulgene oil containing the following oil components (a) to (d) as essential components, and is subjected to an interlace treatment.

(a) A co-adduct of mono- to trihydric alcohol with propylene oxide and ethylene oxide, where the ratio of the number of added moles of propylene oxide and ethylene oxide is 3/
4 to 1/4 and an average molecular weight of 1,000 to 20,000 (b) Alkali metal salt of alkyl phosphates (C)
Water-soluble polyether-modified silicone (d) fatty-rimmed alkali metal salt As the mono- to trihydric alcohol as a raw material for the oil component (a) in the present invention, butanol, diethylene glycol, glycerin, sorbitol, oleyl alcohol, etc. may be used. However, especially 1 such as butanol
Hydrolic alcohols are preferred.

Of course, the present invention is not limited to these exemplified alcohols. Therefore, in the co-addition of propylene oxide and ethylene oxide to these alcohols, it is preferable to randomly add propylene oxide and ethylene oxide, and the ratio of the number of moles of propylene oxide (PO) and ethylene oxide (EO) added is as follows: P.O.
/EO-3/4 to 1/4, preferably PO/EO-1/
It is 1 to 1/3. The average molecular weight of the oil component (a) is 1000 to 20000, preferably 3500 to 150.
00, more preferably 5,000 to 13,000.

The alkyl in the oil component (b) in the present invention is preferably an isoalkyl or straight-chain alkyl having 12 to 18 carbon atoms, and the alkali metal salt is Na or Li.
Salt is good. In the present invention, salts or Na salts of alkyl heptophosphates having 12 to 18 carbon atoms are particularly preferred.

Preferred specific examples of the oil component (b) include isocetyl phosphate Km, lauryl phosphate salt,
Examples include salts of oleyl phosphate.

The oil component (C) in the present invention is a water-soluble polyester obtained by adding ethylene oxide or both ethylene oxide and propylene oxide to an organopolysiloxane such as dimethylpolysiloxane, methylhydrogen polysiloxane, or phenylmethylpolysiloxane. Ether-modified silicones are preferred, particularly dimethylpolysiloxane coaddition-modified with ethylene oxide and propylene oxide.

The fatty acid of the oil component (a) in the present invention is preferably a saturated or unsaturated fatty acid having 12 or more carbon atoms, particularly 16 or more carbon atoms, and specifically, ricinoleic acid (the main component of castor 1 fatty acid), linoleic acid Examples include unsaturated fatty acids such as , lylic acid, and oleic acid, and saturated fatty acids such as palmitic acid and stearic acid, but the present invention is not limited to these examples. Further, as the alkali metal salt, Na and Li salts can be used, but salts are particularly preferred.

Regarding the blending proportions of each of the oil components (a) to (d), it is preferable that these components are blended in the following proportions among all the effective oil components.

Component (a)...30-70% by weight, especially 35-65% by weight Component (b)...1-10% by weight, especially 2-6% by weight
Flow component (c)...0.2 to 5 Kansei, especially 0.5 to 3
Heavy duty component (d)...2 to 6 weight ratio, especially 3 to 5 weight ratio The oil agent in the present invention contains four components (a) to (d) as essential components. In addition to the four components, it also contains mineral oil, a smoothing agent such as a higher fatty acid ester, an emulsifier mainly composed of a surfactant, an antistatic agent, and other known oil components that are commonly used as a spinning oil for polyester multifilament yarns. good.

The oil agent used in the present invention is an aqueous emulsion of the effective oil component as described above, and the concentration of the effective oil component in the aqueous emulsion is preferably 10 to 20% by weight. The amount of adhesion should be approximately 0.5 to 2 times.

The aqueous oil emulsion can be applied to the polyester multifilament yarn by applying it to the melt-spun undrawn or highly oriented undrawn polyester multifilament yarn using an oiling roller in a conventional manner under favorable pressure.

The polyester multifilament yarn used in the present invention is a water jet loom polyester multifilament yarn obtained by melt spinning and drawing according to a conventional method from a homopolyester or copolyester having a strong forming property. In particular, it is a polyethylene terephthalate multifilament for water jet loom weaving with a single yarn denier of 3 deniers or less.

When weaving such a polyester multifilament yarn treated with a specific oil agent as a warp without WJL, in order to obtain even higher weavability, the multifilament yarn is used in the present invention as described in Japanese Patent Publication No. 36-12230, Japanese Patent Publication No. 37 A so-called interlacing process in which the single yarns constituting the multifilament yarn are entangled with each other by a fluid jetting process as known from Japanese Patent No. 1175 is performed at any step between the spinning process and the weaving process.

It is usually preferable that the degree of entanglement of the threads by interlace treatment is about 20 or more. The degree of confounding is measured by the following method.

A load equivalent to 1/10 of the multifilament denier (unit: I
), hang it vertically, divide the multifilament into two at 1α from the top, insert a thin needle into that part, and apply a load (unit: &) [7, Let the load fall at a speed of 2CIII/sea, and read the falling distance (c?n) to the point where the fall stops. If this operation is repeated 50 times for a similar sample and the average PJ@ of the 50 falling distances is x, then the degree of entanglement is defined by the following equation.

(Function) The oil component (a) in the present invention has an effect of improving wear resistance and cohesiveness between filaments especially in a dry state, and those with a molecular weight of less than 1000 have a poor effect of imparting wear resistance. Those having a molecular weight exceeding 20,000 are not preferred because they reduce the smoothness of the filament and make solubility difficult. In addition, the molar ratio of propylene oxide and ethylene oxide is within the above range from the viewpoint of solubility or dispersibility in water and viscosity, that is, PO/
EO-3/4 to 1/4. Outside this range, the solubility in water and the stability of the emulsion formula deteriorate.

The oil component (b) in the present invention has the effect of greatly increasing the number of weaving turns until reed wear occurs during high-speed water jet loom glueless weaving, and achieves the intended purpose of the present invention. It is an oil component that plays an important role in achieving this goal.

The oil component (e) in the present invention has the effect of improving the abrasion resistance of the warp polyester multifilament yarns in a dry state.

The oil component (d) in the present invention has the effect of improving the abrasion resistance between the warp polyester multifilament yarns in a dry state and the abrasion resistance between the warp polyester multifilament yarns and metal in a wet state, Like the oil component (b), it has the effect of greatly increasing the number of weaving turns until 19 reeds are produced during high-speed water jet loom sizing-free weaving, and is particularly important among the oil components of the present invention. It is.

(Example) Example 1 Polyethylene terephthalate having an intrinsic viscosity of 0.61 (measured at 30'Q in a mixed solvent of phenol/tetrachloroethane 6/4) produced by a conventional method was passed through a spinneret with 24 holes and 290 After melt-spinning at "C" and cooling and assimilating the spun filament, 10% of each of the five oil formulations (a) to (e) shown in Table 1 was added using an oiling roller.
1000 m / 1000 m with water-based emulsion oil applied
It was wound up at a winding speed of mA.

The five types of undrawn yarn thus obtained were then drawn 3 to 4 times at 80°C between a foot roller and a draw roller using a bin-grate type drawing and twisting machine according to a conventional method, and heat set at 180'C. Next, an interlacing machine similar to the one shown in Japanese Patent Publication No. 36-12230 @ Figure 3 is used between the twisting devices using a draw roller and a ring spindle to inject compressed air to intertwine the Rin yarns, and then the ring spindle type is used. It was wound up using a twisting machine.

Five types of drawn yarn samples thus obtained (all 50d/
24f) degree of entanglement, abrasion resistance of the time yarn system, and wet time yarn
The metal wear resistance was as shown in Table 1.

Next, these five types of drawn yarn samples were warped without sizing, treated with a normal spinning oil, and subjected to interlace treatment.
t = so-called ordinary polyethylene terephthalate multifilament yarn (50d/24
f) Woven as T-weft into plain weave taffeta in water jet loom.

Weaving speed of water jet loom is 45 Orpm
There were two stages: the case of 55 Orpm and the case of 55 Orpm.

In this example, the abrasion resistance of the time yarn and the humidity yarn
Metal wear resistance was measured by the following measuring method.

(a) Timing yarn - system abrasion resistance Using a new rubbing tester manufactured by Toyo Seiki, tensile load soo, p, number of spinning wheels: 1 multifilament, crossing angle: 4
It is expressed as the number of frictions (average value of 20 measurements) until wear occurs at 0 degrees, 1 twist, and 200 frictions/wL to generate single yarn fuzz.

(b) Wet yarn - stainless steel rectangular flat plate with metal abrasion resistance ff 1.5 mm (13 mm
30mm) into one rotating shaft (diameter 4mm) K:
One end edge of the long axis of the rectangular flat plate is joined so that the plane of the rectangular flat plate is parallel to the rotation axis, and the long axis end edge that is not joined to the rotation axis of the rectangular flat plate has a radius of curvature. 0
．． A propeller-type yarn cut to 75 mm - using a full-length rotary friction device, one multifilament yarn was placed on a rectangular flat plate of this rotary friction device perpendicular to the axis of rotation <45 mm.
1! The multifilament yarn was wound once with a tensile load of Time until fuzz appears (fi) (
Average value of 24 measurements).

Table 1 In Table 1, the specific contents of oil components (a) to (d) and other components are as follows.

Component (a) A random adduct of butanol with propylene oxide and ethylene oxide, with a PO/EO molar ratio of 2
73, Compound component with average molecular f = 9000 (b) Incetyl phosphate (c) Random adduct component of ethylene oxide and propylene oxide of dimethylpolysiloxane (d) Salt and other castor fatty acids (1) Adduct of higher alcohol ethylene oxide and propylphoxide, PO/EO (molar ratio -4/3
), average molecular content 200010-15% by weight (2) Mineral oil (60 seconds) 5-8t (A-%
(3) Higher fatty acid ester 20-22 wound 1 (4)
Ethylene oxide adducts of higher alcohols
3-5 Weight coefficient≦g1 As is clear from the table, the oil components (a) to (d) of the present invention k
The polyester multifilament yarn is surface-treated with an aqueous oil emulsion containing Lj acid component and is interlaced at a weaving speed of 550.
The number of weaving turns until the occurrence of reed wear was 330 turns at high speed Q of rpm, which is approximately 3 times the number of weaving turns in the comparative example.
It can be seen that the water jet loom has excellent glueless high-speed weaving properties.

In the case of the conventional method using polyether, wax, and 7 silicone as essential oil components, the number of weaving turns G until reed wear occurs at a WJL weaving speed of 450 rpln is approximately 300 turns. It can be seen that the weavability is significantly superior to that of the conventional method.

(Effects of the Invention) According to the present invention, it is possible to greatly increase the number of weaving turns until limb wear occurs during glueless high-speed weaving of polyester multifilament yarn (especially high-speed weaving of 500 rpm or more) using a water jet loom. can get.

Claims (3)

[Claims] (1) Polyester mulch for water jet loom glueless weaving characterized by being surface-treated with an aqueous emulsion oil containing the following oil components (a) to (d) as essential components and interlaced. filament yarn. (a) A co-adduct of propylene oxide and ethylene oxide of a mono- to trihydric alcohol, in which the ratio of the number of added moles of propylene oxide to ethylene oxide is 3/4 to 1/4, and the average molecular weight is 1,000 to 20,000. Compound (b) Alkali metal salt of alkyl phosphates (c)
Water-soluble polyether modified silicone (d) Fatty acid alkali metal salt (2) The yarn according to claim 1, wherein the alkali metal salt of the alkyl phosphate is a potassium salt or a sodium salt of an isoalkyl phosphate having 12 to 18 carbon atoms. (3) The yarn according to claim 1, wherein the fatty acid alkali metal salt is a potassium salt of a saturated or unsaturated fatty acid having 12 or more carbon atoms.